A013917: a(n) is prime and sum of all primes <= a(n) is prime
A013917 ➡️ https://oeis.org/A013917

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A013917.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A013917.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A013917.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

Decomposition into weight × level + jump of prime numbers:
- a new classification of primes ➡️ https://decompwlj.com/primedecomp.php
- in 3D - threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Prime_numbers.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A013916: Numbers k such that the sum of the first k primes is prime
A013916 ➡️ https://oeis.org/A013916

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A013916.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A013916.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A013916.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A011775: Numbers k such that k divides phi(k) * sigma(k)
A011775 ➡️ https://oeis.org/A011775

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A011775.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A011775.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A011775.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

150 sequences decomposed into weight × level + jump in one GIF (log(weight),log(level)):
1000 sequences decomposed on https://decompwlj.com

#decompwlj #math #mathematics #maths #sequence #OEIS #GIF #graph #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

A011540: Numbers that contain a digit 0
A011540 ➡️ https://oeis.org/A011540

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/A011540.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/A011540.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/A011540.html

#decompwlj #math #mathematics #maths #sequence #OEIS #JavaScript #php #graph #3D #threejs #webGL #triangular #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieve #fundamental #theorem #arithmetic #research

Theorem of the Day (June 1st, 2026) : The Beardwood–Halton–Hammersley Theorem
Source : Theorem of the Day / Robin Whitty
pdf : https://www.theoremoftheday.org/OR/BHH/TotDBHH.pdf
notes : https://www.theoremoftheday.org/Resources/TheoremNotes.htm#109

#mathematics #maths #math #theorem @Theoremoftheday